Synthesis and photoluminescence properties of Eu3+-doped ZrO2 hollow spheres. Issue 24 (28th December 2015)

• Record Type: Journal Article
• Authors: Zhang, Min; Zuo, Weiwei; Zhu, Meifang; Liu, Dianguang; Chen, Yigao; Zhu, Meng; Hong, Haoran; Yang, Chengyu; Wang, Yiguang; Liu, Jinling; An, Linan
• Is Part Of: Journal of materials research. Volume 30:Issue 24(2015)
• Page Start: 3740
• Page End: 3745
• Publication Date: 2015-12-28
• Subjects: phosphor, -- ZrO2:Eu3+, -- photoluminescence, -- hollow spheres; Materials -- Research -- Periodicals; 620.1105
• DOI: 10.1557/jmr.2015.375
• Languages: English
• ISSNs: 0884-2914

Abstract

Abstract: Abstract : ZrO2 :Eu 3+ hollow spheres were successfully fabricated with the resin microspheres as the template. The sample characterizations were carried out by means of x-ray diffraction (XRD), scanning electron microscope (SEM), and photoluminescence spectra. XRD results revealed that Eu 3+ -doped samples were pure t-ZrO2 phase after being calcined at 873 K. SEM results exhibited that this Eu 3+ doped ZrO2 was hollow spheres; the diameter and thickness of which were about 450 and 50 nm, respectively. Upon excitation at 394 nm, the orange-red emission bands at the wave length longer than 570 nm were from 5 D0 → 7 FJ ( J = 1, 2) transitions. The asymmetry ratio of ( 5 D0 → 7 F2 )/( 5 D0 → 7 F1 ) intensity is about 1.61, 1.26, 1.42, 1.42, 1.40, and 1.38 for the Eu 3+ concentration 0.4, 0.7, 1.0, 1.5, 2.0, and 2.5 mol%, respectively. These values suggest that the asymmetry ratio of Eu 3+ ions is independent of the doping concentration. The optimal doping concentration of Eu 3+ ions in ZrO2 is 1.5 mol%. According to Dexter's theory, the critical distance between Eu 3+ ions for energy transfer was determined to be 16 Å.